US2898742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary tunneling machine having ratcheting advancing and retracting means
Assignee: Goodman Manufacturing Co LP
•
Filing: 1957-03-08
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Granted: 1959-08-11
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Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 James S Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:59
CPC Classifications
E; E21; E21D; E21D9/00; E21D9/10; E21D9/11; E21D9/112; E21D9/1093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932068A
Cited
US2588068A
Cited
US2756036A
Cited
US2756034A
Cited
US2798707A
Cited
US2766028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |